Statistics question and answers for August 21, 2023
- Q A physicist examines 4 seawater samples for potassium chlorideconcentration. The mean potassium chloride concentration for thesample data is 0.604 cc/cubic meter with a standard deviation of0.0177. Determine the 80% confidence...
- Q The followinginformation on maintenance and repair costs and revenues for thelast two years is available from the accounting records at Arnie’sArcade & Video Palace. Arnie has asked you to help...
- Q #29 Among the following statements on measures of centraltendency, which is/ are true?Statement 1: The mode only focuses on the relative position ofthe ranked observations.Statement 2: There are two possible...
- Q USE MINITAB 18 attach screen shots.... End Result Hospital wantsto assess the effectiveness of diabetes education through A1clevels. The hospital created three groups of patients. In thecontrol group no instruction...
- Q A mail-order catalog firm designed a factorial experiment totest the effect of the size of a magazine advertisement and theadvertisement design on the number of catalog requests received(data in thousands)....
- Q The accompanying data are the number of wins and the earned runaverages​ (mean number of earned runs allowed per nine innings​pitched) for eight baseball pitchers in a recent season. Find...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Develop the analysis of variance computations for the followingcompletely randomized design. At α = 0.05, is there asignificant difference between the treatment means?TreatmentABC13610892119115811121248510710310213110788113108118129961111131151201039781106xj120106100sj2112.86137.56187.56State the null and alternative hypotheses.H0: μA =μB...
- Q Fowle Marketing Research, Inc., bases charges to a client on theassumption that telephone surveys can be completed in a mean timeof 15 minutes or less. If a longer mean survey...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q A high-level voltage power supply should have a nominal outputvoltage of 350 V. A sample of four units is selected each day andtested for process-control purposes. The data (20 days,...
- Q Consider a multiple-choice examination with 50 questions. Eachquestion has four possible answers. Assume that a student who hasdone the homework and attended lectures has a 65% chance ofanswering any question...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Take 3 dice and throw these dice 30 times. Let X be the sum ofthe number of dots on upper faces of the dice.Obtain probability distribution of X. Also find...
- Q Recall again that Rind & Bordia (1996) investigated whetheror not drawing a happy faceon customers’ checks increased the amount of tips received by awaitress at an upscalerestaurant on a university...
- Q Jobs and productivity! How do retail stores rate? One way toanswer this question is to examine annual profits per employee. Thefollowing data give annual profits per employee (in units of...
- Q E. Martz tells us that chi-square analysis can be used for morethan just practical applications:Chi-square analysis compares the counts of two categoricalvariables to tell you if a relationship exists between...
- Q USA Today reported that approximately 25% of all state prisoninmates released on parole become repeat offenders while on parole.Suppose the parole board is examining five prisoners up for parole.Let x...
- Q A classroom contains 9 students. A student committee of 3(president, vice-president, and treasurer) must be selected. HarryPotter will serve only as president and only if either of hisfriends Ron Weasley...
- Q John Calipari, head basketball coach for the 2012 nationalchampion University of Kentucky Wildcats, is the highest paid coachin college basketball, with an annual salary of $5.4 million. Thefollowing sample shows...
- Q #1) Consider the following table summarizing the speed limit ofa certain road and the number of accidents occurring on that roadin JanuaryPosted Speed Limit514843352220Reported Number of Accidents252925171914a) Find the slope...
- Q The next day, Valentines Day, February 14th, the owner tries toimprove her sales technique pushing for orders of higher amounts.Again she attempts to write down a number of random sale...
- Q Three randomly selected households are surveyed. The numbers ofpeople in the households are 1​, 2​, and 12. Assume that samples ofsize n=2 are randomly selected with replacement from the populationof...
- Q For many florists, the days leading up to Valentine's Day areamong the busiest of the year. An owner of a florist wanted toestimate the average sale amount for all sales...
- Q 6) For the following problems, identify the hypotheses, defineType I and Type II errors, and discuss the consequences of eacherror. (When you set up the hypotheses, consider which is thehypothesis...
- Q (a) Explain how an undesirable outcome relates to outputvariables. (b) Provide a thorough example (in detail in the form ofa paragraph) of how a particular risk reduction strategy of yourchoosing...
- Q Assume that 74% of people are left-handed. If we select 5 peopleat random, find the probability of each outcome described below,rounded to four decimal places:a. There are some lefties (≥...
- Q ageeducmalesleeptotwrkyngkid32121311334380age: age in year31141292050200educ: years of schooling44171267028150male: =1 if male30120308337860sleep: mins sleep at night, per week64141344825800totwrk: mins worked per week41121406312050yngkid: =3 if children <3 present3512131802113147131292836080Consider the following model:32171336823530sleep = β0...
- Q Suppose you are playing a game with a friend in which you bet ?dollars on the flip of a fair coin: if the coin lands tails youlose your ? dollar...
- Q In what follows use any of the following tests/procedures:Regression, multiple regressions, confidence intervals, one-sidedt-test or two-sided t-test. All the procedures should be done with5% P-value or 95% confidence interval Upload...
- Q An F-statistic is:a.the ratio of two variancesb.a populationparameter          c.the variance of the difference between meansd.a ratio of two meanse.the difference of standard deviationsThe characteristics of the F-Distribution include allbut:a.it is positively...
- Q Give an example of how the niche-picking genotype-environmentcorrelation could be manifest.  Â
- Q Bay Oil produces two types of fuels (regular and super) bymixing three ingredients. The major distinguishing feature of thetwo products is the octane level required. Regular fuel must have aminimum...
- Q The employee credit union at State University is planning theallocation of funds for the coming year. The credit union makesfour types of loans to its members. In addition, the credit...
- Q For each of the topics, choose an 'application' for using themodel to solve a business problem. (In what area could you seeapplying some of the strategies presented in the chapter,...
- Q an energy drink manufacturer has developed four new drinkflavors and would like to conduct a taste test to collect data oncustomers' preferences. Six people were asked to sample and rateeach...
- Q . A teaching assistant for Statistics course as a universitycollected data from students in her class to investigate whetherstudy time per week (average number of hours) differed betweenstudents who planned...
- Q At the .01 significance level, does the data below showsignificant correlation?xy522.78621.22720.96826.8924.341015.281112.821210.86139.2Yes, significant correlationNo**Please explain why its yes/no
- Q The Downtown Parking Authority of Tampa, Florida, reported thefollowing information for a sample of 229 customers on the numberof hours cars are parked and the amount they are charged. Number...
- Q This information is for problems 7 – 14:Two economics professors decided to compare the variance oftheir grading procedures. To accomplish this, they each graded thesame 10 exams with the following...
- Q in Applied Business Research & Statistics, can you explainhow the type of variable (qualitative and quantitative) and thelevel of measurement used influence the presentation of the datacollected for the variable...
- Q 1. The SAT test scores have an average value of 1200 with astandard deviation of 105. A random sample of 35 scores is selectedfor study.A) What is the shape, mean(expected...
- Q A social scientist would like to analyze the relationshipbetween educational attainment (in years of higher education) andannual salary (in $1,000s). He collects data on 20 individuals. Aportion of the data...
- Q The table below gives the age and bone density for five randomlyselected women. Using this data, consider the equation of theregression line, yˆ=b0+b1xy^=b0+b1x, for predicting a woman's bonedensity based on...
- Q Harley's Daycare will run a promotional raffle that offers achance to win either a lifetime discount on merchandises (whichresults in a $1,000 savings) or a 5-year limited discount on anyparty-goods...
- Q A toy company is concerned that its distribution strategy is notworking. Sean Masterson, the marketing manager stated that one ofthe primary goals in the distribution of a particular toy is...
- Q Do the seven steps for each wordproblemStep 1: Establish null andalternate hypothesesState the null and alternativehypothesis (as a sentence and formula).Step 2: Calculate the degrees of freedomStep 3: Calculate t...
- Q The Harleys Daycare. decided to use 20 different water ballooncategories. Their prices (on 100 units) are listed below:27          25          10          7             13          20          27          15          25          10          22          16          11          9             12          20          17          17          23          20a. Construct a grouped frequency distributionwith 6classes.           Step 1. FindRangeStep 2. Given thenumber of...
- Q Convert the following binomial distribution problems to normaldistribution problems. Use the correction for continuity.a. P(x ≤ 16| n = 30 and p = .70)b. P(10 < x ≤ 20)| n...
- Q (PLEASEANSWER BOTH QUESTIONS)Thinkabout the statistic you hear on TV... 4 out of 5 dentist preferTrident gum over other brands. Is this true? Where did they come upwith this? What if...
- Q Let (Un, U, n>1) be asequence of random variables such thatUn and U are independent, Un is N(0, 1+1/n), and U is N(0,1), foreach n≥1.Calculate p(n)=P(|Un-U|<e), for all e>0.Please give...
- Q Provide plots of the χ2(r) distributions (pdf) forvalues of r = 1,2,5,10,20.
- Q What is the difference between a suspicious data point and anextreme data point?
- Q Of 12 possible building sites for factories, 5 have buried toxicwaste sites that no one toldyou about! If you choose 3 of the sites for initial buildinglocations, what is the...
- Q A study of reading comprehension in children compared threemethods of instruction. The three methods of instruction are calledBasal, DRTA, and Strategies. Basal is the traditional method ofteaching, while DRTA and...
- Q The BinomialDistribution.1. What makes thebinomial distribution unique? What are its characteristics?Give a real-worldexample of a distribution of data that would be consideredbinomial.2. Solve the following problem:About 30% of adults in...
- Q Three perfectly logical men are told to stand in a straightline, one in front of the other. A hat is put on each of theirheads. Each of these hats was...
- Q Student ID  Age  Gender  Nationality  Married  Children  Undergrad Major  GMAT Score  Previoussalary  Monthly Expenses  School Debt1  30  Male  US  No  0  Marketing  717  48100  1710  265802  32  Male  US  No  0  Finance  658  62600  1870  03  ...
- Q The following multiple regression printout can be used topredict a person's height (in inches) given his or her shoe sizeand gender, where gender = 1 for males and 0 for...
- Q How are paired t-tests different from two-sample t-tests?1. When are they used: population parameters2. Data types they are used on3. Which sample statistics are used as estimates for thepopulation parameter4....
- Q A simple random sample of 12 e-readers of a certain type had thefollowing minutes of battery life. 287, 311, 262, 392, 313, 260,320, 316, 286, 256, 303, 291 Assume that...
- Q Health insurance benefits vary by the size of the company (theHenry J. Kaiser Family Foundation website, June 23, 2016). Thesample data below show the number of companies providing healthinsurance for...
- Q An important application of regression analysis in accounting isin the estimation of cost. By collecting data on volume and costand using the least squares method to develop an estimatedregression equation...
- Q A wine shop wants to serve its white wine at a mean temperatureof 50 degrees. In a sample of 36 glasses of wine, the mean wasfound to be 53 with...
- Q You are given the sample mean and the population standarddeviation. Use this information to construct the​ 90% and​ 95%confidence intervals for the population mean. Interpret the resultsand compare the widths...
- Q In what follows use any of the following tests/procedures:Regression, confidence intervals, one-sided t-test, or two-sidedt-test. All the procedures should be done with 5% P-value or 95%confidence interval.Open Brain data. SETUP:...
- Q Residents of neighboring towns have an ongoing disagreement overwho lays claim to the higher average price of a​ single-familyhome. A person in one of these towns obtains a random sample...
- Q dentify and analyze a real-life, business application ofstatistics. The “business†can be a for-profit, non-profit, smallor large entity. The following are not acceptable topics:• An application that uses descriptive statistics...
- Q Use R for this problem(Code in R). A firm’s personnel officersampled 36 male and 24 female employees investigate allegationsthat the men in the organization tend to receive hire annualbonuses than...
- Q In a study of the accuracy of fast food​ drive-through orders,one restaurant had 37 orders that were not accurate among 305orders observed. Use a 0.01 significance level to test the...
- Q Allen's hummingbird (Selasphorus sasin) has been studied byzoologist Bill Alther.†Suppose a small group of 17 Allen'shummingbirds has been under study in Arizona. The average weightfor these birds is x...
- Q Let the number of aberrations in the production of a large scalelens have a Poisson distribution. We want the probability that agiven lens contains at most one aberration to be...
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